All existing Joomla! users MUST UPGRADE to this version, due to several High Level vulnerabilities that affect ALL Previous versions of Joomla!
1.0.11 contains the following critical security fixes:
If you are using ANY previous version of Joomla!, you need to upgrade to 1.0.11 as soon as possible.
Project Joomla! is and has always been fully committed to a Security First Principle and new intiatives have and will continue to be started to reinforce and continue this principle. Joomla! 1.0.11 highlights a redoubled effort to put Security at the forefront of everyones lexicon.